Apparatus for drying bone-black.



M. WEINRIOH. APPARATUS FOR DRYING BONE BLACK APPLICATION FILED Q0180,1911, RENEWED MAY 4, 1914. l ;13 4:2'%

Patented Dec. 15, 1914.

2 SEEBTS-SHBET l.

INVENTOR we/zlmra'az/ WITNESSES M. WEINRIOH. APPARATUS FOR DRYING BONEBLACK.

' APPLICATION FILED OUT.30,1911. RENEWED MAY 4.1914 li lfi gfi PatentedDec. 15, 1914.

2 QHEETS-SHEBT 2.

'JNVENIOR. weinriGZJ WITNESSES .2 olu le drum in which the bone black 1sheated, without increasing the amount of.

STATES PATENT @FFICE.

onr'z wnmnron, or YONKERS, NEW YORK.

APPARATUS FOR DRYING Bonn-annex.

. Specification of Letters Patent.

Patented Dec. .15, 1914.

Application filed October 30, 1911, Seria1 No. 657,465. Renewed May 4,1914. Serial No. 836,354.

To' all whom it may concern .Be it known that I, Momz WEINRICH, a

'citizen of the United States, residing at Yonkers, in the county ofWestchester and State of New York, have inyented certain new and usefulImprovements 1n Apparatus for Drying Bone-Black, ofwhich the followingis a specification.

This invention relates to'certain new and .improvements'in apparatus fordrymg, for rev-ivifying, and for decarbonizing bone black; and fordryingother granular or finely divided material as sugar, brewers rai l Thepresent improvements consist in certain new'constructlons andarrangements relating to the interior and the head-end piece oftherevoluble drum in which the boneblack is heated and exposed to. a draftof air for removing through oxidation, impuritiestaken. up during theuse of said bone-black, and also any. excess of carbon, as

' I will hereinafter describe and claim.

; The object of the present improvement is to eatly increase thecapacity of the revfuel, the temperature of the bone-black, while in thedrum, being maintained more uniform and at a lower. level and better anduniform results obtained than by the use of apparatus at presentemployed for the purpose.

In my former Patent'No. 586,278, dated constructed as a smooth cylinderof .say 54 inches in diameter have been equipped with lifting blades orflights having a width of about six inches, these blades or flights be:

ing curved at the inner edges and set against the drum'at an angle ofabout 105. This arrangement generally gave good results, but some of thebone-black retained by the curved edges, was lifted too high and whenfalling in a hot state through the current of air maintained in the drumwas very liable to-kindle. Besides, the six-inch blades referred to didnot hold much char, so that the amount ofchar being in the drum was Inot very great and its temperature accordingly could not be kept veryuniform.

By the arrangement shown in the accompanying drawings and whichillustrate my new arrangement of the interior of the drum, the heatedchar will be exposed in a great number of thin streams to the draft ofair which passes through the drum, whereby the oxidation of theimpurities, or of any excess of carbon, will take place much morerapidly. At the same time, owing to lifting blades or flights employedin the present instance, the amount of char kept in the drum is muchgreater than heretofore, so that its temperature can be main-' tamedmore uniform at the desired degree insuring more uniform and betterresults.

In the accompanying drawings forming part of this specification and inwhich similar reference characters indicate like parts in the severalviews, Figure 1 is a cross sectional view of a drum employing thesalient features of my present invention. Fig. 2 is a plan View of apart of a lifting blade or flight showing three rows of slits. Fig. 2 isa plan view of a part of a lifting blade showing slits of increasedwidth. Fig. 3 is an end view of the head piece at the discharge end ofthe drum showing a plurality of discharge doors. Fig. 4 is a crosssectional view of a drum showing blades or flights of slightly modifiedform, and arranged for w the drying of granulated sugar, or other finelydivided materials. Fig. 5 is a detail showing one of the discharge doorsin the head piece at the discharge end of the drum.

Fig. 6 is a sectional view on the line 55 of Fig. 5. Fig. 7 is ahorizontal sectional View of one end of the drum showing a part of thelifting blades and one of the discharge openings, and a closuretherefor. Fig. 8 is a cross section of a part of the drum showing onetype of knocker. I a

In the said drawings the drum, A, may be of 'any suitable characteradapted-to hold the bone-black to be heated, said drum having anydesired capacity and having' socured around its inner peripheryangle-iron or'other brackets, b, b, 6 6 etc., which'in practice willextend the whole length of the interior of the drum, said brackets beingriveted or otherwise firmly secured to the inner circumference of thedrum and being spaced suitable distances apart. To these brackets areriveted or otherwise firmly sethe much wider ioo cured the liftingblades or flights a, a, a a,

etc., these blades being shownin Fig. 1 as projecting radially inwardfrom the inner circumference of the drum, and said blades, in practicehaving a width of from 25% to 80% of the diameter of the drum, and whendesigned for lifting bone-black should be straight and without curvatureat the inner edges.

By reference to Fig. 2 it will be seen that the inner portions of theblades are provided with a plurality of rowsv of narrow slits, c, c, c".There may be any desired number of rows of these slits; the slits runalong the whole length of each blade, with narrow integral or unbrokenportions-between the slits of thesame row. For treating ordi nary sugarrefinery bone-black, the slits may have a width of from f% to f; of aninch; for coarser bone-black they should be 00111- paratively widerJFrom this description it will be apparent that when the drum is slowlyrevolving the char will drop in a number of thin streams through thedraft of air maintained in the drum substantially as disclosed in myaforesaid prior patents; by opening the air vents in the hood coveringthe discharge end of the drum, as shown in my prior Patent No.

769,421, only on that side on which the char is lifted and dropped, mostof the oxygen of the air admitted maybe utilized, thus preventing anyunnecessary cooling of the char and insuring a material saving in fuel.

In my aforesaid Patent No. 76.9,421,'in Fig. 6 thereof, I show an endView of the discharge end of the drum, consisting of a rim provided witha number of openings for the discharge of the treated bone-black. InFig. 3 of the present drawings, I have re.- duced these openings in therim, D, to four in number and have provided these openings with lids ordoors, (1, d, d and (i said doors being hung on hinges, g, and securedby suitable bolts, h, h, for closing or opening said discharges. Bypushing back the bolts the doors will swing freely on their hinges andthe char accumulated-in the inclined drum behind the rim will flow outthrough the swinging, doors at the bottom of the drum,- and by closingsaid lids the char is retained in the drum until it overflows the rim.The object is to prolong, if

desired, the treatment of the char in the In using the apparatusfordrying granulated sugar, brewers gram, etc., the slitted lifting bladesrequire a different arrange ment from that used for treating char,becausethe object to be sought 1n drying the su ar brewers rain etc. isto ex ose the material through'the whole diameter of the drum to thedraft of air in a great number of thin streams. Accordingly, as' shownin ,Fig. 4, the lifting blades, e, e, e and e, are

tire length is filled with a great number of thin streams of materialexposed to the air draft through the drum.

In that portion of the lifting blades have to be correspondingly wide sothat the passage. is not obstructed.

drum in which the' material is still' quite damp, the slits in the Forgranulated sugar, for instance, which is apt to form lumps, the slits inthe feed end of the drum should be from 1 to 1:} inches wide, graduallynarrowing down toward the dischargeend where the slits should be from 3to 1} inch. In such drums for simplydrying granulated sugar or similarmaterial the lifting blades should have a width of only 20% of thediameter .of the drum,-' I

thereby giving the material a' higher fall through the current of air.

The passage rof theildampx material through the slits can be facilitatedin any suitable manner as'by placing any suitable knocker on top of thedrum.

In View of the foregoing explanation it will be apparent that with thedescribedlifting blades or flights the-capacity of the drum can beeither considerably increased without increasing the amountof fuel orthe temperature ofthe aircurrent correspondmglylowered, thus simplifyingand cheapening the final product.

A suitable form of knocker-for facilitat- 7 ing' the passage ofdampinaaterial-lthrough a cs 15 siown 1n the slits in the lifting Fig.8, wherein .isillustrated a p'art of the cross section of thedrum, saiddrum having on its periphery suitable lugs, I, I, I

and I etch-which operate under a suitable knocker, K, on a rodv or stem,which is piv-' otally securedat one end. The lugs actas cams to lift theknocker, and thesame falls after escaping the cam and thereby impartsthe desired knocking motion to the drum for the purpose stated. I

In Fig. 7 I illustrate'a part of the drum blades or flights, said drumhaving the rim, 1), and said figure showing one of'the dis-'longitudinal section and one-of the angle irons for supporting thefixedslitted lifting charge openings with its lid, d, depending fromthehinge, g, and secured by the bolts,

'h, as before described.

Having thus described my invention What I claim as new and desire tosecure by Letters Patent is r In a revolnble drum for drying, forrevivifymg, and for fdecarbqnizing bone black and for treatingothergraiiular or finely divided material, lifting blades or flights onthe interior of the drum and provided near their edges with a pluralityof slits through which the material to be treated passes and is exposedto the air in a number of thin streams.

2. In a revoluble drum for drying, for revivifying and for decarbonizingbone-black or for drying other materials, a retaining rim secured to thedrum at the discharge end provided with a number of delivery openingsand meansby which said openings may be kept closed or open. 1

3. A revoluble drum for drying,rfor re vivifying and for decarbonizingbone black 15 or for treating other granular or finely di- Videdmaterial, said drum having its interior provided With lifting agencieswhich are slitted near their edges in-the direction of their length toenable the material to pass 20 through them in a number of thin streams.

In testimony whereof I affix my signature in presence of two witnesses.

MORIZ WEINRICH.

Witnesses EDWARD G. CoNIcK, KATHRYN L. McELwnLL.

